Hi, I have a 2010 or 2011 21.5inch Imac. I want to wallmount the same and it seems that it is not as easy as I thought. First I dont even know if I can wall mount it or not as I see VESA mount compliant. I am not sure whether my Imac is a 2010 model or a 2011 model. Basically any suggestion and options to wall mount with a swivel and not very expensive?